WSG303S Sigfox Verified Module (RC1/3/5/6/7 )

Sigfox module WSG303S : RC1/3/5/6/7

WSG303S Sigfox Verified Module (RC1/3/5/6/7) RF Output Power Up To 14dBm (sigfox)
WSG303S RC1 is a Sigfox modem module for the low power wide area network (LPWAN) market. It is designed
with STM’s system S2-LP+STM32 MCU for the European market (EN 300 220). The module was designed for high performance,
high quality, low cost, small form factor and most importantly, high RF power of up to 14dBm. The design is fully compliant to
ETSI regulations. The Sigfox application is running on SMT32 MCU at high efficiency executed at high efficiency using its internal 32bit core Cortex-M0 processor. Every module is preloaded with Sigfox application software, module specific ID/KEY/PAC as referring to Sigfox network system. The preloaded software also includes a bootloader which allows software update or future user application development.


  •  Operating Frequency: ISMRC1(868MHz),RC3/RC5(923MHz),RC6(865MHz),RC7(868Mhz)
  • Sigfox compliant AT command set via UART
  •  Maximum transmission power: 14dBm
  • Current consumption:
  • 26mA Tx at 14dBm (peak current with Sigfox packet transmission) 4.7uA at sleep mode
  • Small-form-factor
  • 22.5×16.5mm Stamp type
  • Compact board design with low external component counts
  • Voltage supply : 2.0V ~ 3.6V
  • Operation Temperature: -40°C ~ 85°C
  •  64KB Flash & 8KB RAM Embedded
  • ETSI EN 300 220 compliant
  • Preloaded Sigfox application with ID/KEY/PAC and bootloader for firmware update
  • Evaluation kit available

Functional Block Diagram:


product description download.

Product Images:


Geographical zones

There are currently 7 zones with Sigfox radio configurations. The countries in these zones are:

  • RC1:
    • Europe: Austria, Belgium, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, United Kingdom.
    • Overseas France: French Guiana, French Polynesia, Guadeloupe, Martinique, Mayotte, New Caledonia, Reunion.
    • Middle East and Africa: Botswana, Kenya, Mauritius, Nigeria, Oman, Senegal, South Africa, Swaziland, United Arab Emirates.
  • RC2: Brazil, Canada, Mexico, Puerto Rico, USA.
  • RC3: Japan.
  • RC4:
    • Latin America: Argentina, Chile, Colombia, Costa Rica, Ecuador, El Salvador, Guatemala, Honduras, Nicaragua, Panama, Peru, Trinidad & Tobago, Uruguay.
    • Asia Pacific: Australia, Hong Kong, Indonesia, Malaysia, New Zealand, Singapore, Taiwan, Thailand.
  • RC5: South Korea.
  • RC6: India.
  • RC7: Russia.

RC technical details

Sigfox Radio Configuration (RC) defines the radio parameters in which the device shall operate: Sigfox operating frequencies, output power, spectrum access mechanism, throughput, coexistence with other radio technologies, etc.

Each radio configuration includes 4 uplink classes: 0u, 1u, 2u, and 3u.

The Sigfox network globally works within the ranges from 862 to 928 MHz. But not all RCs require such a wide range of operation.

Uplink center frequency (MHz) 868.130 902.200 923.200 920.800 923.300 865.200 868.800
Downlink center frequency (MHz) 869.525 905.200 922.200 922.300 922.300 866.300 869.100
Uplink data rate (bit/s) 100 600 100 600 100 100 100
Downlink data rate (bit/s) 600 600 600 600 600 600 600
Sigfox recommended EIRP (dBm) 16 24 16 24 14 16 16
Specifics Duty cycle 1% * Frequency hopping ** Listen Before Talk *** Frequency hopping ** Listen Before Talk *** Duty cycle 1% *
  • Duty cycle is 1% of the time per hour (36 seconds). For an 8 to 12 bytes payload, this means 6 messages per hour, 140 per day.
  • ** Frequency hopping: The device broadcasts each message 3 times on 3 different frequencies. Maximum On time 400 ms per channel. No new emission before 20 s.
  • *** Listen Before Talk: Devices must verify that the Sigfox-operated 200 kHz channel is free of any signal stronger than −80 dBm before transmitting.

Sigfox’s high limit EIRP recommendation is included in each column although regulations sometimes allow for more radiated power than the Sigfox recommendation.

Sigfox’s recommendation is set to comply with the Sigfox technological approach of:

  • Low current consumption
  • Balanced link budget between uplink and downlink communication